Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets 3125 inches across

3125 inches across

demonstrating mechanical advantage as the angle of incline changes the effort needed to roll the cart up the slope

this regulated low-voltage DC power pack outputs a fixed +12V through front-panel terminals on the benchtop

this handle-fitted bicycle wheel lets students feel torque resistance in a spinning mass

Five-piece giant wooden clothespin set sized at 7

Wooden Frame Abacus, 6 Steel Wires Chemistry_Molecular Model Sets 3125 inches acrossWooden frame abacus on a 13. 5 by 9. 5 inch finished base, six steel wires carrying 20 beads each for hands on instruction in counting, place value, and basic arithmetic.